!Shoot'Em-Up Construction Kit (aka: SEUCK) was a "construction kit" for the Commodore 64, Amiga and Atari ST created by
Sensible Software and published by Outlaw (part of Palace Software) in 1987. It allowed the user to make simple shoot-em-ups
by drawing sprites and backgrounds and edit attack patterns. The advertising promoted the Kit with the phrase
"By the programmers of Wizball and Parallax".(s:wiki)

The Kit came with demonstration games to show you what could be done.
The Amiga version includes a games disk (disk 2) containing 3 shoot-'em-ups :
Space Hawk, Blood 'N' Bullets, Psychoblast, created using the construction kit.